Abstract
In this paper, orthogonal experiments are designed to study the sintering and smelting characteristics of the ludwigite ore. The predominant influencing factors of the optimal ratio, basicity and carbon content on different single sintering indexes, including the vertical sintering speed, yield rate, drum strength and low-temperature reduction pulverization index, are firstly explored by the range analysis method, and the main influencing factors on comprehensive indexes are obtained by a weighted scoring method based on different single index investigation. Considering the sintering characteristics, the primary and secondary influencing factors are: ordinary ore ratio, carbon content and basicity, and the optimal ore blending scheme is: basicity 1.7, ordinary ore blending ratio 60% and carbon content 5%. In terms of the smelting characteristics, the research obtains the order of the influencing factors on the softening start temperature, softening end temperature, softening zone, smelting start temperature, dripping temperature, smelting-dripping zone, maximum pressure difference and gas permeability index of the ludwigite sinters by simply considering various single smelting indexes. On this basis, considering the comprehensive softening-melting-dripping characteristics, the primary and secondary influencing factors are: carbon content, ordinary ore ratio and basicity, and the optimal ore blending scheme is: basicity 1.9, ordinary ore blending ratio 60% and a carbon content of 5.5%. Comprehensively, considering the sintering and smelting property of the ludwigite ore, the primary and secondary influencing factors are: carbon content, ordinary ore ratio and basicity, and the optimal ore blending scheme is: basicity 1.9, ordinary ore blending ratio 60% and a carbon content of 5.5%.
Highlights
Publisher’s Note: MDPI stays neutralLudwigite iron ore is a multi-element, symbiotic iron ore containing mainly iron, boron and magnesium elements and containing aluminum, calcium, chromium and radioactive uranium
In order to solve the problem of processing and utilization of ludwigite ore,ore previous have carried out research on the comprehensive utilization of ludwigite in Fengcheng, workers have carried out research on the comprehensive utilization of ludwigite oreseparation, in Liaoning province, since 1976, and have made breakthroughs in conventional
According to the results of the vertical sintering speed of ludwigite ore, the influencing factors were analyzed by range
Summary
Ludwigite iron ore is a multi-element, symbiotic iron ore containing mainly iron, boron and magnesium elements and containing aluminum, calcium, chromium and radioactive uranium. It has a high comprehensive utilization value and an important strategic position [1,2,3,4,5,6]. In order to solve the problem of processing and utilization of ludwigite ore,ore previous have carried out research on the comprehensive utilization of ludwigite in Fengcheng, workers have carried out research on the comprehensive utilization of ludwigite oreseparation, in Liaoning province, since 1976, and have made breakthroughs in conventional. The research results can provide reference for efficient utilization of ludwigite ore on a large scale.
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